求翻译：从理论和计算量上来说，给定一个CRC校验和要逆向计算出其对应的数据流a(x)是很困难的。同样，一个经过修改后的数据流a(x)也很难计算的出与a(x)相同的CRC校验和。从上面的算法我们可以总结出CRC校验和的几个特点：是什么意思？

The theory and computation, given a crc check and it is very difficult to reverse calculate the corresponding data stream a (x). Similarly, a modified data stream a (x) is also difficult to calculate with a (x) the same crc check. From the above algorithm, we can conclude that the crc check, and sev

From a theoretical and calculate the quantity of said that, given a CRC checksum calculated to reverse the flow of data for a (X) is a very difficult task. Similarly, a modified after a stream of data (x) can be difficult to calculate with the (X) a same CRC checksum. From the above algorithm can be

From the theory and the computation load, assigns a CRC verification and wants the reversion to calculate its correspondence data stream a(x) is very difficult.Similarly, a process revises after data stream a(x) very to be also difficult to calculate and a(x) the same CRC verification sum.We may sum

On the theory and computation, given a CRC checksum to reverse calculate its corresponding data stream of a (x) is very difficult. Similarly, a data flow after modifying a (x) is difficult to calculate with a (x) of the same CRC checksum. From the above algorithm we can come up with some features of

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